Pipe-cutter



(No Model.)

C. C. WALWORTH.

y. MPE GUTTER.

No. 279,207. Patented June 12,1883.

UNITED STATES OALEB O. VALVORTH, OF

PATENT OFFICE.

BOSTON, .MASSACHUSETTS PI PEV-CUTTE R.

SPECIFICATION forming part of Letters Patent No. 279,207, dated June 12, 1883.

Application filed February 23, 1883. (No model.)

To all whom it may concern:

Beit known that I, GALEB C. WALWOETH, a citizen of the United States, residing at Boston, in the county of Suffolk and State of Massachusetts, have invented certain new and useful Improvements in Pipe-Cutters; and I do hereby declare that the same are fully described in the following speciiication and illustrated in the accompanying drawings.

This invention relates to improvements in pipe-cutters; and it is carried out as follows, reference being had to the accompanying drawings, where- Figure 1 represents a' side elevation of the invention. Fig. 2 represents a front View, seen from B in Fig. l. Fig. 3 represents a central longitudinal section, and Fig. et represents a cross-section on the line A B shownin Fig-l.

Similar letters refer to similar parts wherever they occur on the different parts of the drawings.A

a, is the hooked jaw, in 011e piece, with which is made the `upwardly-projecting shank a, which is preferably made of a square or rectangular shape, so as to serve as a guide .for the up-and-down adjustable cutter-carriage, which latter is composed of the forked piece b, that embraces the shank a on its three sides, and has its open front ends riveted by means of rivets Z/ b b to the bearing-piece b for the circular cutter c, as shown in the drawings. Said circular'l cutter c is made of very thin and hardened steel with a central perforation to allow it to turn loosely on the hardened-steel pin c', which passes loosely through the perforation in said cutter c, but is driven tight through perforations in the sides of the bearing-piece bf, as shown in Fig. 4. The bearing-piece b is` grooved at b3 for the reception of the cutter c, the internal sides of said groove b3 serving as guides for the opposite sides of the circular cutter, and by this arrangement the side strain on the cutter c when in use is transferred from the pin o', on which it turns, to the internal walls or sides of the groove or slit b, and in this manner I am enabled to use a very thin sheet-steel cutter and to steady it more effectually, so as to prevent its cutting a helical thread instead of a circular groove on the exterior of the pipe while the tool is in use, and thus enable the work of cutting pipes to be done rapidly and in a very accurate manner without danger of breaking the cutter.

The upper end of the shank (His bent to form the internally-screw-threaded hub or nut a, in which the pressure-screw d is made adjustable for the purpose of moving the cutter to and from the hooked jaw a, and the pipe e laid in said j aw during the process of cutting oft' said pipe. The lower end of thescrew dis made cylindrical at 1l and fitted loosely in a cylindrical recess in the upper end of the cutter bearing-piece b, as shown, and is jointed to the latter by means of the pin or rivet b* and the groove al 011 the cylindrical end al of the pressurescrew el, so as to effect an up or down motion of the bearing-piece b, forked piece b, and cutter c by the turning of the screw d.

d is the screw-shank or lever which forms an extension of the screw d and terminates as a handle, d", as is usual on general pipe-cutting tools.

This my improved pipe-cutter is very simple, strong, and durable in its construction and mode of operation, and by making` the hooked.)` aw with an upwardly-proj ectin g shank adapted to serve as a guide for the adjustable cutter-carriage b b, and by making the cutter thin and supported sidewise in the groove or slit b in the bearing-piece b, great accuracy of adjustment and execution of the work is obtained without liability of breakage.

Having thus fully described the nature, construction, and operation of my invention, I wish to secure by Letters Patent and claim- -In a pipe-cutter, the hooked j aw a, shank a', and screw-threaded sleeve a, made in one piece, in combination with the cutter c, journaled to the adjustable bearing-block b, having forked metal guide-piece b attached to it, adapted to slide on the shank a and operated by the screw-shank el df, all combined andarranged substantially in a manner as set forth and described.

In testimony whereof I have affixed my signature in presence of two witnesses.

CALEB C. VALVORTH.

Vitnesses:

ALBAN ANDREN,

ALLEN M. GREEN. 

